Marine Forecast
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Gale warning in effect.
Wind southwest 25 knots increasing to southwest 35 this evening
then diminishing to southwest 30 late overnight. Wind diminishing to southwest
20 early Friday morning.
Scattered flurries changing to snow near midnight then to
flurries Friday morning. Visibility 1 mile or less in
precipitation.
Freezing spray warning in effect.
Risk of freezing spray early this evening. Freezing spray
beginning late this evening and ending Friday morning.
Strong wind warning program has ended for the season.
Winds
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Gale warning in effect.
Wind southwest 25 knots increasing to southwest 35 this evening
then diminishing to southwest 30 late overnight. Wind diminishing to southwest
20 early Friday morning.
Strong wind warning program has ended for the season.
Waves
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Waves 1.5 metres building to 2 to 3 this evening then subsiding
to 1.5 Friday morning.
Weather & Visibility
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Scattered flurries changing to snow near midnight then to
flurries Friday morning. Visibility 1 mile or less in
precipitation.
Freezing Spray
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Freezing spray warning in effect.
Risk of freezing spray early this evening. Freezing spray
beginning late this evening and ending Friday morning.
Ice Forecasts
Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings (In effect)
Eastern Lake Superior
Issued 7:01 PM EST 04 December 2025'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.
Eastern Lake Superior
Issued 7:01 PM EST 04 December 2025Moderate or severe freezing spray is occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.
Technical Marine Synopsis
Issued 6:30 PM EST 4 December 2025 Tonight and Friday At 6:30 p.m. EST tonight ridge located on a line northeast-southwest
over southwestern Ontario.
By 6:30 p.m. EST Friday departing ridge located on a line
northeast-southwest over the Maritimes.
At 6:30 p.m. EST tonight cold front located on a line east-west
over southern Manitoba.
By 6:30 p.m. EST Friday cold front located on a line
northeast-southwest over Lake Superior.